CN109555766B - Full-lamination manufacturing method of display module - Google Patents
Full-lamination manufacturing method of display module Download PDFInfo
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- CN109555766B CN109555766B CN201811278994.8A CN201811278994A CN109555766B CN 109555766 B CN109555766 B CN 109555766B CN 201811278994 A CN201811278994 A CN 201811278994A CN 109555766 B CN109555766 B CN 109555766B
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- 238000003475 lamination Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 96
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 238000010030 laminating Methods 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims abstract description 5
- 239000012790 adhesive layer Substances 0.000 claims description 21
- 238000001179 sorption measurement Methods 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims 1
- 239000003292 glue Substances 0.000 description 19
- 239000000047 product Substances 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000012015 optical character recognition Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010327 methods by industry Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a full-lamination manufacturing method of a display module, wherein the display module comprises a first substrate and a second substrate; the full-lamination manufacturing method comprises the following steps: (1) coating: coating optical cement on the first substrate; (2) aligning and laminating: aligning the first substrate and the second substrate on a horizontal plane by using an alignment adjustment system; then the first substrate and the second substrate are jointed, and the thickness of the display module is controlled within a specified range by moving the alignment adjustment system in the vertical direction; (3) side curing: and simultaneously exposing and curing the four sides of the display module positioned at the laminating station by using a curing device. According to the invention, after the first substrate and the second substrate are aligned and attached, the display module is directly exposed and cured at the attachment station, the display module does not need to be moved, and the process steps are simplified. And the process of moving the display module to the next station is avoided.
Description
Technical Field
The invention mainly relates to the technical field of processing technologies of display modules, and particularly relates to a full-lamination manufacturing method of a display module.
Background
With the economic development, due to the characteristics of high reliability and high transmittance of full lamination, full lamination technology gradually permeates into industrial products, household electrical products, vehicle-mounted products and three-dimensional (aviation, navigation and aerospace) products, the requirements of related customers are increased year by year, and full lamination by using optical cement such as OCR (optical character recognition) has become an irreversible technical trend.
However, when the display screen and the touch screen (including the capacitive screen and the resistive screen) are completely bonded by using the OCR optical adhesive, the bonded parts are likely to be displaced after the bonding. The requirement of the client on the alignment precision of the product cannot be met. The full-lamination manufacturing process of the display module needs to be researched.
In the prior art, the inventor finds that after the related components are attached, the related components of the display module are deviated due to flowing of glue of the optical adhesive layer because the optical adhesive layer is easy to flow before being cured. Although some of the published patents disclose solutions for controlling the flow of glue, a glue wall is required to be formed between two substrates, and the formation of the glue wall is not favorable for the narrow-edge design of the smart product, so that the screen occupation ratio of the display screen of the product is maximized. In addition, in some other published schemes, the front surface is pre-cured, and then the front surface and the back surface are cured; in addition, in the prior art, the alignment and lamination process and the product curing process are carried out at different stations, and the product needs to be moved, so that the process is complex.
Disclosure of Invention
In order to solve the problems, the invention provides a full-lamination manufacturing method of a display module, which can solve the problem that a part laminated by a full-lamination process is easy to shift.
The invention provides a full-lamination manufacturing method of a display module, wherein the display module comprises a first substrate and a second substrate; the full-lamination manufacturing method comprises the following steps:
(1) coating: coating optical cement on the first substrate;
(2) aligning and laminating: aligning the first substrate and the second substrate on a horizontal plane by using an alignment adjustment system; then the first substrate and the second substrate are jointed, and the thickness of the display module is controlled within a specified range by moving the alignment adjustment system in the vertical direction;
(3) side curing: and simultaneously exposing and curing the four sides of the display module positioned at the laminating station by using a curing device.
Compared with the prior art, the display module is directly exposed and cured on the side face of the display module at the laminating station after the first substrate and the second substrate are aligned and laminated, the display module does not need to be moved, and the process steps are simplified. And the problem that glue flows easily when the display module moves to the next station is avoided. In addition, the four sides of the display module are exposed and cured simultaneously, so that the four sides of the optical adhesive layer can be cured firstly to form the adhesive wall, on one hand, the outward flowing of the internal glue is avoided, and meanwhile, the relative positions of the first substrate and the second substrate are kept unchanged.
Further, the curing device comprises side fixing light sources circumferentially arranged along four sides of the display module, and in the step 3, the side fixing light sources on the four sides are positioned on the side of the display module and directly face the optical adhesive layer in height.
Furthermore, the side fixed light source is a strip-shaped LED light source; in the step 3, the distance between the side fixing light source and the side edge of the optical adhesive layer is 10-100 mm, and the light intensity of the side fixing light source is 50-3000 mw/cm2And the irradiation curing temperature of the side fixing light source is less than 60 ℃.
Furthermore, the distance between the side fixed light source and the side edge of the optical adhesive layer is 40-60 mm, and the light intensity of the side fixed light source is 2000-3000 mw/cm2And the irradiation curing temperature of the side fixing light source is 25-45 ℃. When the side edge is cured, the curing rate of the side edge of the optical adhesive layer reaches more than 95%.
Further, after the step 3, the display module is moved out of the attaching station, and front curing is carried out on the display module.
Further, the first substrate and the second substrate are aligned on the horizontal plane; the corresponding alignment recognition on the first substrate and the second substrate is shot by a camera, the offset data is automatically measured by an image processing program, and a position adjusting driver is fed back to automatically adjust the position. Through accurate counterpoint discernment and feedback back automatic adjustment, guaranteed the precision of laminating counterpoint, ensure the product precision.
Furthermore, the alignment adjusting device is also provided with an upper bedplate vacuum adsorption device and a lower bedplate vacuum adsorption device.
Further, after the step 2 and before the step 3, the upper platen vacuum adsorption device breaks vacuum and lifts 5-200 um. When the first substrate is the touch screen, the stress generated when the vacuum adsorption device is used for carrying out vacuum adsorption on the touch screen is large, so that the touch screen has large deformation, and when the first substrate is solidified in the state, the first substrate, namely the box thickness of the display screen, is easy to cause uneven thickness, and further the yellow spots are easy to cause. In addition, the lifting distance should not be too large, so that the upper platen still maintains control over the thickness of the display module.
As the preferred scheme, the upper bedplate vacuum adsorption device breaks vacuum and lifts by 5-50 um.
Further, the first substrate is a screen cover plate or a touch screen, and the second substrate is a display screen.
Further, the first substrate is a display screen, and the second substrate is a screen cover plate or a touch screen.
Compared with the prior art, the invention has the following beneficial effects:
after the first substrate and the second substrate are aligned and attached, the display module is directly exposed and cured at the attaching station, the display module does not need to be moved, and the process steps are simplified. And the problem that glue flows easily when the display module moves to the next station is avoided. In addition, the four sides of the display module are exposed and cured simultaneously, so that the four sides of the optical adhesive layer can be cured firstly to form the adhesive wall, on one hand, the outward flowing of the internal glue is avoided, and meanwhile, the relative positions of the first substrate and the second substrate are kept unchanged.
Drawings
Fig. 1 is a schematic view of a curing principle in a full-lamination manufacturing method of a display module according to an embodiment of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is a top view of a curing principle in the method for manufacturing a display module according to the embodiment of the present invention.
Reference numerals:
100-display module, 101-first substrate, 102-second substrate, 103-optical glue layer, 201-upper platen, 202-lower platen, and 301-side light fixing source.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
FIGS. 1 to 3 are drawings illustrating an embodiment of the present invention. The invention provides a full-lamination manufacturing method of a display module. The display module 100 includes a first substrate 101 and a second substrate 102.
In this embodiment, the first substrate 101 is a touch panel, and the second substrate 102 is a display panel.
The full-lamination manufacturing method of the display module 100 comprises the following steps:
(1) coating: coating optical glue on the first substrate 101 by using an automatic gluing device by using a screen printing coating technology to form an optical glue layer 103;
(2) aligning and laminating: aligning the first substrate 101 and the second substrate 102 on a horizontal plane by using an alignment adjustment system; then, the first substrate 101 and the second substrate 102 are bonded, and the thickness of the display module 100 is controlled within a specified range by moving the alignment adjustment system in the vertical direction;
(3) side curing: and simultaneously exposing and curing the four sides of the display module positioned at the laminating station by using a curing device.
Compared with the prior art, the display module is directly exposed and cured on the side face of the display module at the laminating station after the first substrate and the second substrate are aligned and laminated, the display module does not need to be moved, and the process steps are simplified. And the problem that glue flows easily when the display module moves to the next station is avoided. In addition, the four sides of the display module are exposed and cured simultaneously, so that the four sides of the optical adhesive layer can be cured firstly to form the adhesive wall, on one hand, the outward flowing of the internal glue is avoided, and meanwhile, the relative positions of the first substrate and the second substrate are kept unchanged.
In the coating process, the glue coating pattern and the amount of glue used can be reasonably designed according to the appearance and the fitting requirements of the first substrate 1010 and the second substrate 102.
In the process of aligning the first substrate and the second substrate on the horizontal plane by using the alignment adjustment system, a camera is used for shooting corresponding alignment identification on the first substrate 101 and the second substrate 102, an image processing program is used for automatically measuring offset data, and a position adjustment driver is fed back for automatically adjusting the position. Through accurate counterpoint discernment and feedback back automatic adjustment, guaranteed the precision of laminating counterpoint, ensure the product precision.
The alignment device further includes an upper platen 201 and a lower platen 202 for fixing the first substrate and the second substrate, respectively. Preferably, the upper platen 201 and the lower platen 202 each further have a vacuum suction device. The first substrate 101 and the second substrate 102 are respectively sucked by the upper platen vacuum suction device and the lower platen vacuum suction device, and the relative positions in the X, Y direction on the horizontal plane are adjusted, so that the first substrate 101 and the second substrate 102 are accurately aligned. When the first substrate 101 and the second substrate 102 are bonded (bonded), the upper platen 201 is pressed down or the lower platen 202 is lifted up in the vertical direction, so that the thickness of the optical adhesive layer 103 between the first substrate 101 and the second substrate 102 is controlled, and finally the thickness of the display module 100 is controlled within a predetermined range. The upper platen vacuum adsorption device adsorbs a surface of the first substrate 101 away from the optical adhesive layer 103. The glue of the optical adhesive layer 103 has a certain viscosity (about 1000-6000 ps), and can fall off after being turned over only after a certain time effect, so long as the attaching (pressing) time is controlled.
It will be appreciated that the alignment adjustment system also includes a position adjustment actuator (not shown). The position adjustment actuator is a multi-axis moving device for performing position adjustment of the first substrate 101 and/or the second substrate 102 in the horizontal plane and the vertical direction. The position adjustment drive may be coupled to the lower platen 202; or the position adjustment driver is connected with the upper platen 201; or a position driver connects the upper platen 201 and the lower platen 202 simultaneously.
Preferably, after the alignment and lamination and before the curing, the upper platen vacuum adsorption device breaks vacuum and releases the first substrate, and the upper platen is lifted by a distance h, as shown in fig. 2, where h is in a range of 5-200 um. When the vacuum adsorption device carries out vacuum adsorption on the first substrate touch screen, the generated stress is large, so that the touch screen has large deformation, and when the touch screen is solidified in the state, the second substrate, namely the display screen, is easy to cause uneven box thickness and further yellow spots. In addition, the distance of lifting should not be too big, because the optical cement layer has not solidified yet, the thickness of display module assembly still need control in the curing process, goes up the platen and keeps less interval with first base plate and can make the platen still keep the control to display module assembly thickness.
As the preferred scheme, the upper bedplate vacuum adsorption device breaks vacuum and lifts by 5-50 um. This may allow the thickness of the display module to be better controlled before curing.
The curing device comprises side fixing light sources 301 circumferentially arranged along four sides of the display module, and in step 3, the side fixing light sources 301 on the four sides are positioned on the side of the display module 200 and are opposite to the optical adhesive layer 103 in height.
As shown in FIG. 3, preferably, in the curing process, the distance L between the side light source 301 and the side edge of the optical adhesive layer 103 is 10-100 mm, and the light intensity of the side light source is 50-3000 mw/cm2The irradiation curing temperature of the side fixing light source is less than 60 ℃.
Preferably, in the curing process engineering, the distance between the side light source and the side edge of the optical adhesive layer is 40-60 mm, and the light intensity of the light source is 2000-3000 mw/cm2The irradiation curing temperature of the side fixing light source is 25-45 ℃. The side curing under the process condition has the curing rate of the side of the optical adhesive layer of more than 95 percent.
Preferably, in the curing process engineering, the side-fixing light source is a strip-shaped LED light source. Different from other point light sources, a plurality of strip-shaped LED light sources surround the four sides of the display module, so that the four sides of the optical adhesive layer form an adhesive wall more quickly.
After step 3 side solidification is completed, in order to solidify the glue in the middle of the display module, the display module is required to be moved out of the attaching station, and front solidification is carried out on the display module.
Example two
Different from the first embodiment, in the present embodiment, the first substrate is a screen cover, and the second substrate is a display.
EXAMPLE III
Different from the first embodiment, in the present embodiment, the first substrate is a display screen, and the second substrate is a screen cover or a touch screen.
Compared with the prior art, the invention has the following beneficial effects:
after the first substrate and the second substrate are aligned and attached, the display module is directly exposed and cured at the attaching station, the display module does not need to be moved, and the process steps are simplified. And the problem that glue flows easily when the display module moves to the next station is avoided. In addition, the four sides of the display module are exposed and cured simultaneously, so that the four sides of the optical adhesive layer can be cured firstly to form the adhesive wall, on one hand, the outward flowing of the internal glue is avoided, and meanwhile, the relative positions of the first substrate and the second substrate are kept unchanged.
Claims (8)
1. A full-lamination manufacturing method of a display module comprises a first substrate and a second substrate; the full-lamination manufacturing method is characterized by comprising the following steps:
step 1, coating: coating optical cement on the first substrate;
step 2, alignment and lamination: aligning the first substrate and the second substrate on a horizontal plane by using an alignment adjustment system; then the first substrate and the second substrate are jointed, and the thickness of the display module is controlled within a specified range by moving the alignment adjustment system in the vertical direction;
step 3, side curing: simultaneously exposing and curing the four sides of the display module positioned at the laminating station by using a curing device;
after the step 3, moving the display module out of the attaching station, and carrying out front curing on the display module;
the alignment adjustment system is also provided with an upper bedplate vacuum adsorption device and a lower bedplate vacuum adsorption device; and after the step 2 and before the step 3, the upper bedplate vacuum adsorption device breaks vacuum and lifts by 5-200 um.
2. The full-lamination manufacturing method for the display module according to claim 1, wherein the curing device comprises side fixing light sources circumferentially arranged along four sides of the display module, and the side fixing light sources are strip-shaped LED light sources; in step 3, the four side light fixing sources are located at the side edges of the display module and face the optical adhesive layer in height.
3. The full-lamination manufacturing method of the display module according to claim 2, wherein the side light source is a strip-shaped LED light source; in the step 3, the distance between the side fixing light source and the side edge of the optical adhesive layer is 10-100 mm, and the light intensity of the side fixing light source is 50-3000 mw/cm2And the irradiation curing temperature of the side fixing light source is less than 60 ℃.
4. The full-lamination manufacturing method of the display module according to claim 3, wherein the distance between the side light source and the side edge of the optical adhesive layer is 40-60 mm, and the light intensity of the side light source is 2000-3000 mw/cm2And the irradiation curing temperature of the side fixing light source is 25-45 ℃.
5. The full-lamination manufacturing method of the display module according to claim 1, wherein in the process of aligning the first substrate and the second substrate on the horizontal plane: the corresponding alignment recognition on the first substrate and the second substrate is shot by a camera, the offset data is automatically measured by an image processing program, and a position adjusting driver is fed back to automatically adjust the position.
6. The full-lamination manufacturing method of the display module according to claim 1, wherein the vacuum absorption device of the upper platen breaks vacuum and lifts 5-50 um.
7. The full-lamination manufacturing method of the display module according to claim 1, wherein the first substrate is a screen cover plate or a touch screen, and the second substrate is a display screen.
8. The full-lamination manufacturing method of the display module according to claim 1, wherein the first substrate is a display screen, and the second substrate is a screen cover plate or a touch screen.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023002550A1 (en) * | 2021-07-20 | 2023-01-26 | 信越エンジニアリング株式会社 | Display substrate bonding device and bonding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110610654B (en) * | 2019-08-22 | 2021-07-23 | 武汉华星光电技术有限公司 | Display module and full-lamination method thereof |
| CN110450422B (en) * | 2019-09-05 | 2021-07-06 | 深圳市巨力方视觉技术有限公司 | Article attaching method, device and computer-readable storage medium |
| CN112389074B (en) * | 2020-10-21 | 2023-06-23 | 苏州希盟智能装备有限公司 | Substrate bonding method and substrate bonding device |
| CN113344930B (en) * | 2021-08-09 | 2021-10-29 | 常州铭赛机器人科技股份有限公司 | Fitting deviation detection method based on machine vision |
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| KR20100077677A (en) * | 2008-12-29 | 2010-07-08 | 삼성전자주식회사 | Backlight unit and liquid crystal display having the same |
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